30 lines
1005 B
TypeScript
30 lines
1005 B
TypeScript
import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils";
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import {DecryptResult} from "@/decrypt/entity";
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import {parseBlob as metaParseBlob} from "music-metadata-browser";
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export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
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: Promise<DecryptResult> {
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const buffer = new Uint8Array(await GetArrayBuffer(file));
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let length = buffer.length
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for (let i = 0; i < length; i++) {
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buffer[i] ^= 163
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}
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const ext = SniffAudioExt(buffer, raw_ext);
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if (ext !== raw_ext) file = new Blob([buffer], {type: AudioMimeType[ext]})
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const tag = await metaParseBlob(file);
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const {title, artist} = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist)
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return {
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title,
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artist,
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ext,
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album: tag.common.album,
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picture: GetCoverFromFile(tag),
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file: URL.createObjectURL(file),
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blob: file,
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mime: AudioMimeType[ext]
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}
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}
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